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British Prime Minister David Cameron speaks during a business seminar in Mumbai on February 18, 2013. Cameron arrived in India's financial hub Mumbai on a three-day trade-focused visit clouded by a corruption scandal over British-made helicopters sold to New Delhi. AFP PHOTO/Indranil MUKHERJEEINDRANIL MUKHERJEE/AFP/Getty Images

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British Prime Minister David Cameron speaks during a business seminar in Mumbai, India, Monday, Feb. 18, 2013. Cameron is on a two-day official visit to India. (AP Photo/Rafiq Maqbool)

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British Prime Minister David Cameron, center, arrives to deliver a speech at a business seminar in Mumbai, India, Monday, Feb. 18, 2013. Cameron is on a two-day official visit to India. (AP Photo/Rafiq Maqbool)

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British Prime Minister David Cameron arrives to pay his respects at a memorial for fallen police and uniformed personnel who lost their lives in the 2008 terror attacks in Mumbai on February 18, 2013. British Prime Minister David Cameron arrived in India with what he called Britain's biggest ever overseas business delegation for a three-day visit clouded by a corruption scandal.. AFP PHOTO/Indranil MUKHERJEEINDRANIL MUKHERJEE/AFP/Getty Images

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British Prime Minister David Cameron arrives to pay his respects at a memorial for police and uniformed personnel who lost their lives in the 2008 terror attacks in Mumbai on February 18, 2013. British Prime Minister David Cameron arrived in India with what he called Britain's biggest ever overseas business delegation for a three-day visit clouded by a corruption scandal. AFP PHOTO/Indranil MUKHERJEEINDRANIL MUKHERJEE/AFP/Getty Images

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British Prime Minister David Cameron lays a wreath at a memorial for police and uniformed personnel who lost their lives in the 2008 terror attacks in Mumbai on February 18, 2013. British Prime Minister David Cameron arrived in India with what he called Britain's biggest ever overseas business delegation for a three-day visit clouded by a corruption scandal. AFP PHOTO/Indranil MUKHERJEEINDRANIL MUKHERJEE/AFP/Getty Images

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epa03589395 British Prime Minister David Cameron leaves the Police Memorial to victims killed in the 26/11 Mumbai terror attacks in 2008, in Mumbai, India, 18 February 2013. Cameron began a visit to India expected to focus on trade and commerce issues amid a controversy over a corruption scandal surrounding British-made helicopters. EPA/DIVYAKANT SOLANKI

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Prime Minister David Cameron attends a reception at the Museum of Mumbai for Indian and British businessmen and women and hosted by the CEO of BP Bob Dudley. PRESS ASSOCIATION Monday February 16 2013. Mr Cameron is on a three day trade visit to India where he will later hold talks with his Indian counterpart Dr Manmohan Singh in Delhi. See PA story POLITICS Cameron. Photo credit should read: Stefan Rousseau/PA Wire

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Prime Minister David Cameron attends a reception at the Museum of Mumbai for Indian and British businessmen and women and hosted by the CEO of BP Bob Dudley (right) and Mukesh Ambani (left) of the Indian firm Reliance and the richest man in India. PRESS ASSOCIATION Monday February 16 2013. Mr Cameron is on a three day trade visit to India where he will later hold talks with his Indian counterpart Dr Manmohan Singh in Delhi. See PA story POLITICS Cameron. Photo credit should read: Stefan Rousseau/PA Wire